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st_isclosed polyhedral surface

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git-svn-id: http://svn.osgeo.org/postgis/trunk@5819 b70326c6-7e19-0410-871a-916f4a2858ee
This commit is contained in:
Regina Obe 2010-08-13 15:15:56 +00:00
parent b782000a54
commit f402f7f828
1 changed files with 34 additions and 3 deletions
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37
doc/reference_accessor.xml
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@ -651,7 +651,7 @@ FROM (SELECT ST_BuildArea(
<refname>ST_IsClosed</refname>
<refpurpose>Returns <varname>TRUE</varname> if the
<varname>LINESTRING</varname>'s start and end points are coincident.
<varname>LINESTRING</varname>'s start and end points are coincident. For Polyhedral surface is closed (volumetric).
</refpurpose>
</refnamediv>
@ -669,7 +669,7 @@ FROM (SELECT ST_BuildArea(
<title>Description</title>
<para>Returns <varname>TRUE</varname> if the <varname>LINESTRING</varname>'s
start and end points are coincident.</para>
start and end points are coincident. For Polyhedral Surfaces, it tells you if the surface is areal (open) or volumetric (closed).</para>
<para>&sfs_compliant;</para>
<para>&sqlmm_compliant; SQL-MM 3: 7.1.5, 9.3.3</para>
@ -681,11 +681,14 @@ FROM (SELECT ST_BuildArea(
<para>&Z_support;</para>
<para>&curve_support;</para>
<para>Availability: 2.0.0 support for Polyhedral surfaces was introduced.</para>
<para>&P_support;</para>
</refsection>
<refsection>
<title>Examples</title>
<title>Line String and Point Examples</title>
<programlisting>postgis=# SELECT ST_IsClosed('LINESTRING(0 0, 1 1)'::geometry);
st_isclosed
@ -716,6 +719,34 @@ postgis=# SELECT ST_IsClosed('MULTIPOINT((0 0), (1 1))'::geometry);
-------------
t
(1 row)</programlisting>
</refsection>
<refsection>
<title>Polyhedral Surface Examples</title>
<programlisting>
-- A cube --
SELECT ST_IsClosed(ST_GeomFromEWKT('POLYHEDRALSURFACE( ((0 0 0, 0 0 1, 0 1 1, 0 1 0, 0 0 0)),
((0 0 0, 0 1 0, 1 1 0, 1 0 0, 0 0 0)), ((0 0 0, 1 0 0, 1 0 1, 0 0 1, 0 0 0)),
((1 1 0, 1 1 1, 1 0 1, 1 0 0, 1 1 0)),
((0 1 0, 0 1 1, 1 1 1, 1 1 0, 0 1 0)), ((0 0 1, 1 0 1, 1 1 1, 0 1 1, 0 0 1)) )'));
st_isclosed
-------------
t
-- Same as cube but missing a side --
SELECT ST_IsClosed(ST_GeomFromEWKT('POLYHEDRALSURFACE( ((0 0 0, 0 0 1, 0 1 1, 0 1 0, 0 0 0)),
((0 0 0, 0 1 0, 1 1 0, 1 0 0, 0 0 0)), ((0 0 0, 1 0 0, 1 0 1, 0 0 1, 0 0 0)),
((1 1 0, 1 1 1, 1 0 1, 1 0 0, 1 1 0)),
((0 1 0, 0 1 1, 1 1 1, 1 1 0, 0 1 0)) )'));
st_isclosed
-------------
f
</programlisting>
</refsection>
<refsection>